Antimicrobial susceptibility to β-lactam antibiotics and production of BRO blactamase in clinical isolates of Moraxella catarrhalis from a Japanese hospital

We investigated BRO-beta-lactamase production of Moraxella catarrhalis isolates and its antimicrobial susceptibility to beta-lactams. Of the 233 isolates, 232 were BRO producers and 224 were BRO-1 producers. Four isolates exhibited elevated ceftriaxone minimum inhibitory concentration (2 mu g/mL) and different pulsed-field gel electrophoresis patterns and we expect this number to increase in the near future. Copyright (C) 2016, Taiwan Society of Microbiology. Published by Elsevier Taiwan LLC.